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Electronic transport and magnetic properties of Ge1-xMnx/Ge(100) films are investigated as a function of Mn dilution. Depending on x, characteristic temperatures separate different regimes in both properties. Resistivity exhibits an…

材料科学 · 物理学 2007-05-23 N. Pinto , L. Morresi , M. Ficcadenti , R. Murri , F. D'Orazio , F. Lucari , L. Boarino , G. Amato

We have performed magneto-transport and high-resolution angle-resolved photoelectron spectroscopy (ARPES) measurements on palladium (Pd) doped topological insulator Pd$_{x}$Bi$_{2}$Te$_{3}$ (0 $\leq$ x $\leq$ 0.20) single crystals. We have…

We report magnetoresistance and Hall angle measurements of the electron-doped cuprate La$_{2-x}$Ce$_x$CuO$_4$ over a wide range of dopings from $x = 0.08 - 0.17$. Above 100 K, we find an unconventional $\sim H^{3/2}$ magnetic field…

强关联电子 · 物理学 2021-03-10 Nicholas R. Poniatowski , Tarapada Sarkar , Richard L. Greene

We report the phase diagram of the doping series U_2Pt_xRh_(1-x)C_2, studied through measurements of resistivity, specific heat and magnetic susceptibility. The Neel temperature of U_2RhC_2 of ~ 22 K is suppressed with increasing Pt…

强关联电子 · 物理学 2015-01-28 N. Wakeham , Ni Ni , E. D. Bauer , J. D. Thompson , E. Tegtmeier , F. Ronning

The dc magnetization (M) and electrical resistivity (\rho) as functions of magnetic field and temperature are reported for a series of lightly electron dopedCa(1-x)La(x)MnO(3) (0<=x<=0.10) specimens for which magnetization [Phys. Rev. B…

强关联电子 · 物理学 2007-05-23 C. Chiorescu , J. J. Neumeier , J. L. Cohn

Fe$_4$GeTe$_2$, an itinerant vdW ferromagnet (FM) having Curie temperature (T$_C$) close to room temperature ($\sim 270$ K), exhibits another transition (T$_{SR}$ $\sim$ 120 K) where the easy axis of magnetization changes from in-plane to…

介观与纳米尺度物理 · 物理学 2024-04-12 Riju Pal , Buddhadeb Pal , Suchanda Mondal , Prabhat Mandal , Atindra Nath Pal

We report field and temperature dependent measurements of the thermoelectric power (TEP) and the Nernst effect in the itinerant metamagnet UCoAl. The magnetic field is applied along the easy magnetization c-axis in the hexagonal crystal…

强关联电子 · 物理学 2015-06-15 A. Palacio-Morales , A. Pourret , G. Knebel , T. Combier , D. Aoki , H. Harima , J. Flouquet

We have studied the temperature dependence of the photoemission spectra of Pr$_{1-x}$Ca$_x$MnO$_3$ (PCMO) with $x=0.25$, 0.3 and 0.5. For $x=0.3$ and 0.5, we observed a gap in the low-temperature CE-type charge-ordered (CO) phase and a…

强关联电子 · 物理学 2009-11-13 K. Ebata , M. Hashimoto , K. Tanaka , A. Fujimori , Y. Tomioka , Y. Tokura

We report on the MBE-growth and magnetotransport properties of p-type BeMnTe, a new ferromagnetic diluted magnetic semiconductor. BeMnTe thin film structures can be grown almost lattice matched to GaAs for Mn concentrations up to 10% using…

We present an overview of magnetotransport measurements on the heavy-fermion superconductor CeIrIn$_5$. Sensitive measurements of the Hall effect and magnetoresistance (MR) are used to elucidate the low temperature phase diagram of this…

强关联电子 · 物理学 2008-10-13 Sunil Nair , M. Nicklas , J. L. Sarrao , J. D. Thompson , F. Steglich , S. Wirth

The transport coefficients of the Anderson model are calculated by extending Wilson's NRG method to finite temperature Green's functions. Accurate results for the frequency and temperature dependence of the single--particle spectral…

凝聚态物理 · 物理学 2009-10-22 T. A. Costi , A. C. Hewson , V. Zlatic

We report high field magneto transport of Sm/PrFeAsO. Below spin density wave transition (TSDW), the magneto-resistance (MR) of Sm/PrFeAsO is positive and increasing with decreasing temperature. The MR of SmFeAsO, is found 16%, whereas the…

超导电性 · 物理学 2015-06-03 R. S. Meena , Shiva Kumar Singh , Anand Pal , Anuj Kumar , R. Jha , K. V. R. Rao , Yi. Du , X. L. Wang , V. P. S Awana

The magnetic, transport, and structural properties of (Ga,Cr)As are reported. Zincblende Ga$_{1-x}$Cr$_{x}$As was grown by low-temperature molecular beam epitaxy (MBE). At low concentrations, x$\sim$0.1, the materials exhibit unusual…

材料科学 · 物理学 2009-11-07 A. Dakhama , B. Lakshmi , D. Heiman

We report transport measurements, including: Hall, Seebeck and Nernst Effect. All these transport properties exhibit anomalous field and temperature dependences, with a change of behavior observed at about H 1.5T and T 15K. We were able to…

强关联电子 · 物理学 2012-05-24 S. Lerer , M. Ben-Shalom , G. Deutscher , Y. Dagan

We present a systematic study of the dc-resistivity, Hall effect, and magnetoresistance in the normal state of quasi 2D heavy fermion superconductors CeMIn5 (M: Rh and Co) under pressure. Here the electronic system evolves with pressure…

We present low-temperature thermal conductivity measurements on the cuprate Tl_2Ba_2CuO_{6+delta} throughout the overdoped regime. In the T -> 0 limit, the thermal conductivity due to d-wave nodal quasiparticles provides a bulk measurement…

We report extensive resistivity, Hall, and magnetoresistance measurements on thin films of the electron-doped cuprate \PCCO~(PCCO), as a function of doping, temperature and magnetic field. The doping dependence of the resistivity and Hall…

超导电性 · 物理学 2016-12-07 Yoram Dagan , Richard L. Greene

We report on recent experimental results from transport measurements with large Hall bars made of high mobility GaAs/AlGaAs heterostructures. Thermally activated conductivities and hopping transport were investigated in the integer quantum…

介观与纳米尺度物理 · 物理学 2009-10-30 M. Furlan

Behavior of \rho_{ab}(T) and R_{H}(T) is presented for LSCO and YBCO single crystals in the lightly hole-doped antiferromagnetic region, with an emphasis on the R_{H}(T) data. In both systems, R_{H} is virtually constant at moderate…

超导电性 · 物理学 2007-05-23 Yoichi Ando , Kouji Segawa , A. N. Lavrov , Seiki Komiya

We study the temperature and field dependence of the magnetic and transport properties of the non-Fermi-liquid compound Ce(Ru_{1-x}Rh_x)_2Si_2 at x=0.5. For fields $\lesssim $0.1T the experimental results show signatures of the presence of…

强关联电子 · 物理学 2009-10-31 Y. Tabata , D. R. Grempel , M. Ocio , T. Taniguchi , Y. Miyako